RL78/G1H
CHAPTER 18 RF TRANSCEIVER
Page 619 of 920
(50) Receive data counter register (BBRXCOUNT)
This register is used to indicate the receive data counter value upon reception. It enables the checking of
how many bytes of receive data are currently stored to the receive RAM. The value is cleared to “0” when
the packet receive ends.
The BBRXCOUNT register consists of 16 bits and can be accessed (serial interface communication) in 8 bit
unit.
Reset signal generation clears this register to 0000H.
Figure 18 - 63 Receive Data Counter Register (BBRXCOUNT) Format
Caution
Be sure to clear bits 11 to 15 to “0”.
(51) Transmit frame length register (BBTXFLEN)
This register is used to set the frame length value upon transmission. Set the total value of payload data
length and the CRC length (in 2 or 4 bytes) for the frame length value. Transmits data regardless of the
transmit frame length value when the ACK auto-reply function is enabled to automatically reply with ACK.
The BBTXFLEN register consists of 16 bits and can be accessed (serial interface communication) in 8 bit
unit.
Reset signal generation clears this register to 0000H.
Figure 18 - 64 Transmit Frame Length Register (BBTXFLEN) Format
Caution
Be sure to clear bits 11 to 15 to “0”.
Address: 00A3H, 00A2H
After reset: 0000H
R/W
Symbol
15
14
13
12
11
10
9
8
BBRXCO
UNT
0
0
0
0
0
RXCOUNT10 RXCOUNT9
RXCOUNT8
7
6
5
4
3
2
1
0
RXCOUNT7
RXCOUNT6
RXCOUNT5
RXCOUNT4
RXCOUNT3
RXCOUNT2
RXCOUNT1
RXCOUNT0
RXCOUNT[10:0]
Receive data counter value
Address: 00A5H, 00A4H
After reset: 0000H
R/W
Symbol
15
14
13
12
11
10
9
8
BBTXFLEN
0
0
0
0
0
TRNFLEN10
TRNFLEN9
TRNFLEN8
7
6
5
4
3
2
1
0
TRNFLEN7
TRNFLEN6
TRNFLEN5
TRNFLEN4
TRNFLEN3
TRNFLEN2
TRNFLEN1
TRNFLEN0
TRNFLEN[10:0]
The frame length value upon transmission
Содержание RL78/G1H
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